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Acharya N G Ranga Agricultural University (1996)

Organic matter and nitrogen returns to soil by different cropping systems rotations on a vertisol in the Indian semi-arid tropic

Abdurahman, M D S

Titre : Organic matter and nitrogen returns to soil by different cropping systems rotations on a vertisol in the Indian semi-arid tropic

Auteur : Abdurahman, M D S

Etablissement de soutenance : Acharya N G Ranga Agricultural University.

Grade : PhD thesis (1996)

Résumé
Organic matter plays an important role in soil management and crop production : It is the natural source of mineral N. The results of the experiments carried out show the importance of quantifying the organic matter inputs to the soil by different cropping systems rotations. The results show that in the absence of N fertilizers, S/PP S/PP can deposit in the soil a substantial (2395 kg ha-’) amount of root organic matter on the other hand the non-leguminous system StSAF S+SAF contribute 1652 kg ha1 of root organic matter to the soil. But if the crops are given adequate N fertilizer the results show that almost similar mounts of root can be deposited even by the non-leguminous system. The sane findings were observed in the case of N content of the roots deposited to the soil by the different crops in the different systems. Legumes can also contribute to the organic matter of the soil by way of fallen dry leaves, which if incorporated into the soil mineralize and conitributes ubstantial amounts of N

Présentation : ICRISAT

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